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CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Revenue:      
Software licenses $ 14,093 $ 10,113 $ 8,537
Software maintenance 5,126 4,706 4,351
Services 1,749 3,304 5,173
Hardware 317 1,094 4,933
Royalties 281 404 726
Total revenue 21,566 19,621 23,720
Costs and expenses:      
Cost of software licenses 1,101    
Cost of services 766 1,790 2,359
Cost of hardware 234 717 3,485
Research and development 6,938 5,800 5,505
Selling and marketing 4,142 3,945 3,741
General and administrative 3,286 3,497 3,668
Total costs and expenses 16,467 15,749 18,758
Patent related income 809 43 2,127
Operating income 5,908 3,915 7,089
Other income (expense)   12 (59)
Interest income 280 151 225
Income before provision for income taxes 6,188 4,078 7,255
Provision for (benefit from) income taxes 2,085 (536) 2,672
Net income $ 4,103 $ 4,614 $ 4,583
Net income per share - basic (in dollars per share) $ 0.18 $ 0.20 $ 0.20
Net income per share - diluted (in dollars per share) $ 0.18 $ 0.20 $ 0.20
Weighted-average shares - basic (in shares) 22,829 22,899 22,703
Weighted-average shares - diluted (in shares) 22,898 22,965 22,787
Comprehensive income:      
Net income $ 4,103 $ 4,614 $ 4,583
Other comprehensive income (net of tax):      
Unrealized gain/(loss) on available for sale securities 45 (35) 96
Comprehensive income $ 4,148 $ 4,579 $ 4,679